Rotary pump.



E. H. GOLLINGS.

ROTARY PUM P.

APPLICATION FILED OCT. 29. I914.

- Patented Apr. 23. 1918;

2 susns-suur 1.

E. H. GOLLINGS.

ROTARY PUMP.

APPLICATION FILED 001.29. 1914.

Patented Apr. 23,1918.

2 SHEETS-SHEET 2.

ELTATWK GOJLLTNGS, OF CHICAGO, TLILTNOTfl.

FaQTAEi? PUMP.

specification of Letters Patent.

Patented Apr. 2% llfliltl.

Application flled (Butcher 2t, 1914. Serial Ito. sea-tee.

To all w/wmit mag) concern:

Be it known that l, lELmon H. Gerunds, a citizen. of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Rotary Pumps, of which the following is a specification;

My invention relates in general to rotary pumps and has for its object broadly the provision of a rotary pump for water and other liquids consisting of a minimum number of moving parts so arranged that a continuous and substantially even flow from the pump may be produced.

- A principa object of this invention is the PIOVlSIOII. of an efl ective and durable pump in which all valves and equivalent constructions will be entirely eliminated. These parts soon wear and are difficult to'maintain in adjusted relation and their elimination is therefore extremely desirable.

A further object of the invention is to provide such adevice in which sliding contact between movin parts will be reduced to a minimum thereby eliminating as far as possible wear of the parts in service.

A still further object of the invention is the provision of a deviceof this character which may be cheaply constructed, readily assembled and installed and which may be operated with a minimum expenditure of power.

On the drawings:

Fi re 1 is'a longitudinal vertical sectiona view of-a pump embed ing my invention with the parts arrange in one posi- Fig. 2 is a partial horizontal, sectional view of the same;

Fig. 3 is a view similar the parts separated;

Figs. 4, 5 and" 6 are" transverse vertlcal to Fig. 1 showing sectional views taken respectively on the lines 4-4, 5-5 and 66 of Fig. l and Figs; 7, 8, 9, and 10 are dlagrammatic views showings! cornpletecycle of operation. The pump embodying my invention and shown on the drawings comprises a suitable base 11 having at each end an elongatedbearing 12, 13 disposed at a substantial distance above the base upon supports or legs M. The central axis of the bearing 13 is stitutes a feed shaft disposed above or out of alinement with the central axis of the bearing 12 and in the present instance this is accomplished by providing the boss 15 upon the end of the base 11 beneath the bearing 13, although it will be manifest as the invention is better understood that the central axes of the bearings 12, 13 may be otherwise arranged it only being necessary for the purposes of this invention that the said axes be out of alinement each with the other and in parallelism therewith.

Two hollow shafts are provided, one through each bearing. One of these shafts, that indicated on the drawings at 16, condicated at 17, a delivery shaft. Each of these shafts carries a rotating member, that of the shaft 16 bein indicated generally at 18 and that of the s aft 17 being indicated generally at 19 in Fig. 3. These rotating elements cooperate to lift or pull the water or other li ui'd being pumped into the device throug 'b the hollow shaft 16 and then force it out through the hollow shaft 17. Each member is threaded upon the end of its respective shaft so that the shaft as well as the member rotates as will be hereinafter described.

The rotatable member 18 which is fastened upon the end of the shaft 16 consists of a hub 21 in which is engaged an end of the shaft 16 and from which extends a cirand the other, that inv Sll The space within the flange 24 is divided into two substantially equal compartments by a partition 28 extending from the central point of the opening 25 to the diametrically opposite point. The ends of this partition are straight and extend throughout the depth of the flange 24:, The center of the partition is formed of a continuation of the hub and is curved in the present instance oppositely in its outer and inner halves. This is provided by cutting away th hub at opposite sides at 27 and 29 throughout half the cylindrical wall, a cross web 26 being formed integrally with the curvedparts 31 thus provided to separate .the compartments. It will be noted on viewing the figures that this arrangement permits free communication between one compartment and the lnlet shaft 16 and between the other compartment and the outlet or delivery shaft 17. The end 32 of the partition, which is the end ad] acent the opening 25, is connected through the Opening to the outer flange 23 by a partition 33 having tongues 34 among its opposite longitudinal edges adapted to fit into appropriate grooves in the end 32 of the partition 28 and in the adjacent face of the flange The space within the flange 24 1s thus d1- vided into two compartments each communicating, with the space between the flanges 23 and 24. For the sake of convenience we will indicate the compartments by the letters a and b the compartment a being the compartment which communicates with the shaft 16 through the opening 27 and the compartment 6 being the compartment which communicates with the outlet shaft 17 through opening 29. A web 35 forms a partial closure for the outer edge of the flange 24 and this web closes completely the compartment a at one side and is provided with a central aperture 36 to permit communication with the shaft 17 and compartment 7).

The rotatable element 19 secured upon the shaft 17 consists of a hub 37 havin an outwardly extending web 38 forme integral therewith upon the edge of which is a cylindrical flange 39 cut away at 41. The flange 39 is of appropriate diameter to permit it to be inserted between the flanges 23, 24 of the rotatable member 18, the edges left in cutting away the portion 41 alining with the edges of the flange 24 provided in forming the opening 25 already described. The diameter and thickness of the cylindrical flange 39 are preferably such that when the parts are assembled as will be later described the inner surface of the flange 39 may contact with the outer surface of the flange 24 at one side of the device and the outer surface of the flange 39 may contact with the inner surface of the flange 23 at the other side. In the present instance the first mentioned contact is provided at the top of the device and the last mentioned at the bottom, the position of these contacts being determmed by the relative position of the axes of the rotatable elements.

Viewing Figs. 3 and 6 it will be noted that the web 38 is cut away back of and beneath the cutaway portion 41 of the flange 39 as indicated at 42. The cut away portion .is shaped to receive a pair of disk members 45 slidably engaging the partition 33 extending between the flange 23 andthe partition 28 within the flange 24. The members 45 have a flat surface in sliding engagement with the sides of the partition 33 and have plurality of fastening bolts 47 extending through a closing plate 48 having an aperture 49 at its center through which the hub of the member 19 extends. The aperture 49 is of appropriate form and size to permit relative movement of the shafts 16 and 17 and their attached members to rotate about the respective axes. Rotation is imparted to the pump through a sprocket wheel 50 se-' cured upon the hub 21 of the member 18 and this rotation is transmitted to the member 19 the turning of the one member necessarily requiring the turning of the other although if desired separate means may be provided for turnin each rotatable member and its corresponding shaft. A packing 0r gasket member is secured upon the hub 37 of the rotatable member 19' and comprises in the present instance a disk 51 carrying a packing 52 at its face adjacent the web of the rotatable member for bearing against the outer face of the closing plate 48 the central portion of this plate being rendered smooth for the urpose.

ater is delivered to the shaft 16 and removed from the shaft 17 through bushings 53 connected to collars 54 which in turn are threaded to the ends of the bearings 13 and 12 said collars forming a part of stufiingboxes 55 for the prevention of leakage.

The operation of the pump will now be described reference being had more particularly to Figs. 7, 8, 9 and 10 it being remembered that the compartments labeled a in these figures are connected with the inlet and the compartments labeled 1) with the outlet of the pump. The theory of operation of the-pump embodyin my invention and just described requires t e provision of two main compartments continuously and alternately, increasing and diminishing in size the increasing compartment serving continuously to draw in water or other liquid and the decreasing compartment to expel it through the outlet. For the purpose of brevity and clearness the o eration will be described with the pum ful of water it being understood that tiie theory of operation is the same when the pump starts to run and when it only contains air or a mixture of air and water.

Viewing Fig. 7 in which the partition 33 extends downwardly and which may be coni it as well as from the compartment 03 must half the compartment f. At this com artment c has increased to its maximum 1 incense sidered the initial arrangement in the cycle, it will be noted that two compartments 0 and d are formed between the flanges 39 and 24: separated by the partition 33. The,

compartment (2' is in communication With the compartment 1) and the compartment 0 with the compartment a. As the parts are rotating in the direction of the arrow it is obvious that the compartment d will decrease in size and the compartment 0 increase correspondingly. The water contained in the compartment at will be forced as the rotation continues into compartment 7) and then to the outlet. At the same time the space in the compartment 0 will increase and water will be sucked from the compartment a into the compartment 0, new water orliquid being drawn into the. compartment a. At this time, as soon as the parts leave the position shown in Fig. 7, two new compartments are formed, namely, (3 and f, the compartment 6 opening up in communication' with compartment 0, must be filled by liquid from either the compartment aor the compartment 0. The compartment 7 immediately begins to diminish and water from he forced through the compartment 6 to the outlet. Water is thus being drawn into two compartments in this stage of the operation and being forced from two to-the outlet. In effect the compartments 6 and c, which are increasing, constitute a single chamber of constantly enlarging capacity, the enlargement of its ca acity drawing water from the inlet, and in efil'ect the compart ments cl and 7, which are the compartments decreasing in size, constitute a single'chamber'constantly diminishing and forcing water out through the supply or outlet. At the end of the next quarter revolution, when the arts have arrived at the position shown in ig. 9, it will be noted thatthe opening in the flange 39 and the opening in the flange 24 are brought together, eliminating entirely the compartment d and reducing by stage the and ls'closed ofl'fullet water. In this figure this compartment is lettered g for the sake of clearness. The compartment c has enlarged until it is equal in size to the compartment f. In passing to the next quarter revolution or'that shown in Fig. 10,, the

'55- water from the compartment a, the -com-.

compartment 0 opens and begins to' draw 'partment e enlarging as shown.l-As soon as the parts move from the" position shown in Fig. 9 the compartment 9 is drawn into communication with the chamber b and be comes the compartment 0! already described.

7 From this polnt on this compartment diminis hes in capacity; the compartment 7 also diminishing until the parts reach theposition shown 1n Fig. 7, when the compartpartment e reaches its maximum or that lettered h in Fig. 7

It will be noted from the drawings that the space 9 between the flanges 24. and 39 and the space it between the flanges39 and 23 are both crescent shape. The provision of the two crescent shape spaces'arranged anddivided as described, rovide a continuous and almost even radia opening opposite the openings into the compartments a and b,

from the other so that water may be drawn into the compartment '1) and out of'the compartment or in a substantially constant amount, one decreasing compartment cooperating with the other decreasing comtat ment f passes out of existence and the com for as this opening is cut down from one compartment it is enlarged correspondingly partment and one increasing compartment cooperating with the other increasing c'ompartment. This gives a substantially even flow of water from the pump. The difl'erence in the rate of diminution or increase of one compartment or the compartment in' I lit is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it w1ll be apparent that various changes may be made in the form, construction and arrangement of the arts without departing from the spirit and scope of the invention or sacrificing any of its material advantages, the form hereinbefore described being merely a preferred embodiment. thereof.

1 claim:

1. In a rotary pump the combination of two rotatable members in rolling contact constructed and arranged to .form between them at difl'eren't times in their cycle of rotation pumping chambers of which two are of continuousl changing capacity, one of s'aidchambers "eing connected with an inlet and the other with an outlet, and each of said chambers subdivided into two parts each having a variable rate of change of capair of arranged to form pumping chambers at different times in their cycle of operation, two of said chambers bein disposed one within the other and being a ways in communication with the inlet and increasing in capacity while so connected at difierent and compensating rates. Y

4. In a rotary pump the combination of a plurality of rota'rymembers constructed and arranged to form pumping chambers at different times in their cycle of operation, a chambers being connected. with the inlet and a pair with the outlet, those with the inlet increasing in capacity and those with the outlet decreasing in capacity, the members of each pair being located one within the other and increasing and diminishing respectively at different and compensating rates.

5. In a'rotary pump the combination of a plurality of rotary members constructed and arranged to form pumpin chambers at different times in their eye e of operation, a pair of chambers being connected with the inlet and a pair with the outlet, those with the inlet increasing in capacity and those with the outlet decreasing in capacity, the

members of each pair being located one within the other and increasing and diminishing respectively at different and compensating rates, said chambers automatically reversing their connection after passing their zero omt. P 6. In a rotary pump the combination of rotatable members in rolling contact and constructed and arran ed to form between them at different times in their cycle of rotation a pair of crescent shaped pumping chambers, oppositely arranged and separated by a common wall, said chambers bein in communication with each other at a shifting point, a partition dividing said communication between the inlet and the outlet of said pump and a portion of said crescent on one side being in communication with the outlet and the portions on the other side with the inlet.

7. In a rotary pump the combination of rotatable members in rolling contact and constructed and arranged to form between them at different times in their c cle of rotation a pair of crescent shape umping chambers, the ends of one crescent eing arranged at the center of the other, a partition movable around the axis of one of said members and extending across said chambers and adapted to move from the center of one chamber around to the center of the other, one side of said partition being in communication with the inlet and the other side with the outlet of said pump, said partition thereby first forcing water from onehalf of one crescent to the outlet and replacing this displacement by water from the inlet of the other side of said partition.

8. In a rotary pump the combination of a rotatable element having a pair of outwardly extending flanges providing communicating compartments, a second rotatable member having an outwardly extending flange adapted to be positioned between the flanges of the first mentioned member, said last mentioned member being mounted to rotate about an axis offset from the axis of said first mentioned member and dividing one of said compartments into two crescents and a partition for dividing said crescents.

9. In a rotary pump the combination of a rotatable element having a pair of outwardly extending flanges providing communicating compartments, a second rotatable member having an outwardly extending flange adapted to be positioned between the flanges of the first mentioned member, said last mentioned member being mounted to rotate about an axis offset from the axis of said first mentioned member and dividing one of said compartments into two crescents-and a partition in said first mentioned member for dividing said crescents and forcing water out of them to the pump outlet and drawing water into them from the ump inlet.

10. In a rotary ump t e combination of two rotatable mem ers having their axes of rotation disposed out of alinement, said members being movable together at'like velocity, overlapping flanges between said members forming compartments for drawing water into one compartment and forcing it out from the other.

11. In a rotary ump the combination of two rotatable shai s arranged end for end with their axes disposed out of alinement flanged members on the ad'acent ends of said shafts, one of said flange members extending into the other and forming compartments therewith adapted to draw water into said pump and to force water out from said pump, and means for rotating said shafts with their members.

12. In a rotary pum the combination of a pair of rotatable hoilow shafts arranged end for end with their axes out of alinement and provided-with members in rolling contact and at their adjacent ends, such members providing compartments for drawin water into one of said shafts and forcing 1t out through the other, and means for rotating said shafts in unison.

13. In a rotary pump the combination of a pair of rotatable shafts arranged and for end with their axes disposed out of a1ine--- ment, flanged members on the adjacent ends of said shafts arranged with the flanges overlapping and forming compartments, means for inclosing one of said members and its flange within the other member to form closed compartments of varying capacity connected with the inlet and outlet of said; pump, and means for rotating sand slmfte in UIHSOII.

ELLICK H. GULLIN Wifnesses:

J. C. CARPENWEE, ESTHER Aenmze. 

